1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
<!--plsfield:text-->
<HTML><HEAD>
<TITLE>C API Reference -- Ns_DStringTrunc</TITLE>
<LINK rel=Previous href="c-ch176.htm">
<LINK rel=ToC href="toc.htm">
<LINK rel=Index href="master.htm">
<LINK rel=Next href="c-ch178.htm">
</HEAD><BODY BGCOLOR="#ffffff"><A NAME="topofpage"></A>
<TABLE WIDTH=100%>
<TR>
<TD ALIGN=LEFT>
<A NAME="topofpage"></A> <IMG SRC="as-c-sm.gif">
</TD>
<TD ALIGN=RIGHT>
<A href="c-ch176.htm"><IMG BORDER="0" src=navbprev.gif alt="[ Previous ]"></A>
<A href=toc.htm> <IMG BORDER="0" src=navbhome.gif alt="[ Contents ]"></A>
<A href=master.htm> <IMG BORDER="0" src=navbhelp.gif alt="[ Index ]"></A>
<A href="c-ch178.htm"> <IMG BORDER="0" src=navbnext.gif alt="[ Next ]"></A>
<A name="7983"> </A>
</TD>
</TR>
</TABLE>
<a name="121122">
</a><h3>Ns_DStringTrunc</h3>
<a name="121123">
</a><h4>Overview</h4>
Truncate an Ns_DString
<a name="43860">
</a><a name="132912">
</a><h4>Syntax</h4>
<pre> <a name="43861"></a>void Ns_DStringTrunc(
<a name="43862"></a>Ns_DString *dsPtr,
<a name="43863"></a>int length
<a name="43864"></a>);
</pre><p><a name="134250">
</a><h4>Description</h4>
<p><a name="43866">
</a>The Ns_DStringTrunc function truncates an Ns_DString to the given length. Unlike Ns_DStringFree, which truncates the Ns_DString to length 0 and frees any memory that may have been allocated on the heap, Ns_DStringTrunc allows you to truncate the string to any length. It maintains any memory allocated on the heap. This function is useful in a loop where the Ns_DString is likely to overflow the static space each time through. Using Ns_DStringTrunc instead of Ns_DStringFree will avoid having the Ns_DString call malloc to obtain the addition space in each iteration. You will need to call Ns_DStringFree eventually to free any space that may have been allocated for the Ns_DString.</p>
<a name="230722">
</a><h4>Examples</h4>
<pre> <a name="230723"></a>Ns_DString ds;
<a name="230741"></a>int i;
<a name="230744"></a>
<a name="230725"></a>Ns_DStringInit(&ds);
<a name="230745"></a>for (i=0; i < 50; i++) {
<a name="230751"></a> Ns_DStringPrintf(&ds, "%s%d", "aBigString", i);
<a name="230764"></a> /* do something with the dstring constructed above*/
<a name="230765"></a> Ns_DStringTrunc(&ds, 0);
<a name="230746"></a>}<br>
<a name="230729"></a>Ns_DStringFree(&ds); /* finished with dstring */
</pre><p><p><a name="230730">
</a></p>
<TABLE BORDER="2" CELLPADDING="1" width="100%">
<TR><TD COLSPAN=3><P ALIGN=Center>
<IMG SRC="bluebult.gif">
<A HREF="#topofpage">
<FONT SIZE=-1>Top of Page</FONT></A>
<IMG SRC="bluebult.gif">
</TD></TR>
<TR><TD COLSPAN=3><P ALIGN=Center>
<A href="c-ch176.htm">
<IMG BORDER="0" src=navbprev.gif alt="[ Previous ]"></A>
<A href=toc.htm>
<IMG BORDER="0" src=navbhome.gif alt="[ Contents ]"></A>
<A href=master.htm>
<IMG BORDER="0" src=navbhelp.gif alt="[ Index ]"></A>
<A href="c-ch178.htm">
<IMG BORDER="0" src=navbnext.gif alt="[ Next ]"></A>
<BR align=center>
<FONT size=-1>Copyright © 1998-99 America Online,
Inc.</FONT>
</TD></TR></TABLE></BODY></HTML><!--plsfield:end-->
|
